Spraying device



n A. B. HULL srRAY/ING DEVICE May 21,- 1929.

..3 Sheets-Sheet l Filed Jan. 13, 1927 NVENTOR. ./lrurl'ull BY ma V ma() A TTORNEYS May 2l, 1929. A. B. HULL SPRAYING DEVICE Filed Jan. 13, 1927 3 Sheets-Sheet 2 A TTORNEY May 21, 1929.

A. B. HULL- SPRAYING DEVICE Filed Jan'. 1s, 1927 3 Sheets-Sheet 3 INVENTOR,

A v Auru/l BY @QC/fw ATTORNEYS Patented May 21, 19,29. v

UNITED STATES PATENT OFFICE. l

vARTHUR B. HULL, OF GASPORT, NEW YORK, ASSIGNOR TO FRIEND MANUFACTUR- ING COMPANY, OF YGASPORT, NEW YORK, A CORPORATION OF NEW YORK.

sPRAYING DEVICE.

Application led January 13, 1927. Serial No. 160,943.

This invention relates to fluid handling and controlling devices generally, but more particularly to devices adapted to the use of fluids or liquids under pressure for various purposes and .to means for the accurate and elicient control thereof. Accordingly, the invention is herein illustrated as being embodied in aV high pressure spray gun, having a multiplicity of uses, but particularly designed foi-'use in pressure cleaning work of various kinds.

It is an object of the invention to provide a device of the character indicated which will be highly ecient in use, substantially fool proof and possessing unusual durability.

A further object relates to the simplicity of the assembled structure as well as the logically simple manner in which the component parts thereof may be assembled and disassembled for inspection and repair. g g

-A further and more specific object of the invention relates to a novel nozzle structure and valve means associated therewith, Whereby the fluid under pressure may be selectively directed through one or more of a plurality of dissimilar ports or passages, thereby delivering the compressed fluid in stream-s or sprays of different characteristics to suit different wo'rking conditions. By the valve structure provided, it is possible to modifyv the normal characteristics of one of the proj ected streams or sprays by imposing thereon to a. greater or less extent the action of a second spray or stream. n Y

It is aI further object of the invention to provide in a device of the character indicated, a novel Valve structure, the efliciency of, which Vwill increase with the normal wear incident to use, and wherein the pressure within the device will insure the proper seating of the valve.

Other objects andadvantages of the invention will appear in connection with the detailed description of the several forms illustrated in the drawings, whereinV Fig. 1 is a longitudinal section through a high pressure spray gun structure in accordance with my invention.

Fig. 2 is a vertical section taken substantiallv on the line 2-2 of Fig. 1, and looking in the direction of the indicating arrows.

Fig. 3 is a vertical section taken on line 3 3 of Fig. 1, looking in the direction of the indicating arrows associated therewith.

Fig. 4 is a perspective View of the nozzle body employed in the structure shown 4Fig. 1.

Fig. 5 is a longitudinal section through ak slightly modified form of pressure gun assembly.

Fig 6 is a longitudinal section through the discharge end of the gun shown in Fig. 5 but illustrating .a different position of the valve and outlet ports ot' the nozzle body.

Figs. 7, 8, and 9 are vertical sections taken prrr ligie 7--7, 8--8, and 9 9, respectively, of

Figs. 10 and 11 are longitudinal sections through the discharge portion of a spray guny similar to that shown in Fig. 5, but showing the use of a valve similar to that employed in the structure of Fig. 1.

Fig. 12 is a longitudinal section through a portion `oa modified form of spray gun embodying a different type of nozzle body.

Figs. 13' and 14 are vertical 'sectionstaken on lines 13-13 and -14-14 respectively, of

Fig. 12.

-The spray gun illust-rated in Fig. 1 comprises a fluidpressure chamber 1 in the form of an open ended tube or cylinder, the ends of which are externally threaded for the reception of correspondingly threaded intake` The inlet connection and outlet connections. 2 is in the form ot a cup threadingly engaged with the corresponding Aend of the pressure cylinder 1, and vprovided with an angularly disposed hose receiving nipple 3 gitudinally extending sleeve 4.

an yinternally threaded packing ycup, 5,` between which and the sleeve 4 suitable packy anda lon- The sleeve i 1s externally threaded for the reception of with an enlarged portion to accommodate the valvek disk in its various movements, and y 1s further provided at its-,opposite extremity with internal threads for the reception of a threaded end of a nozzle body 12. Disposed within the enlarged portion of the cup 10 and extending between said cup and the rear rface Y v which acts to force the valve disk into a iirni seating relation with the surface ot the noz zle body. The nozzle body. as shown in Figs. 1, 3, and a, is provided with two outlet ports or passages 13 and 1li. At the inlet end of the nozzle body, these passages are eccentri cally disposed with reference to the longitudinal axis of the @un While at the outlet end oi" the body the passage 1d terminates concentric with the circular end of the body and With the final discharge port 16 in the pressure cup 15. The other nozzle passage 13 terminates at the outlet end oit the nozzle body in eccentric relation to the passage let- The purpose oi' this specilie arrangement et the ports to enable them to be controlled by a single disk valve and to facilitate the selective or simultaneous disposition ot the ports in operative relation With the port 9 in the valve disk. By means ot this arrangement of the passages with relation to the valve, it is possible to eiect discharge ot the fluid un* der pressure through either the passage 13 or the passage 14 or to modify the discharge through one oi. the said passages by imposing upon it a partial discharge from the other' passage. The outlet end ot the nozzle body is externally threaded for the reception of the pressure cap 15 in which the discharge orifice 1G is formed. ln the 'form shown in Fig. 1. the Vcap 15 is provided with asmall conical chamber between the end oi the nozzle body and the discharge orifice. It is thus apparent that fluid under pressure passing through the port 14 Will pass directly through the discharge orifice 16 in a substantially straight, forceful stream, Whereas, the fluid passing through the port 10. this port being eccentric With respect to the discharge orilice. vill assume a whirling or swirling condition betere passing through the discharge orifice. A modification ot the characteristics of one stream by imposing the force oi the other stream upon it, takes place Within the conical chamber in the cap 15 and in proportions determined by the particular setting of the valve disk 8.

The structure shown in Fig. 5 is generally similar to that above described but differs in specific structural details and in the manner otassembly. The details of this form ot the"L invention were designed primarily tor a pressure gun wherein the several parts are to be permanently united in some manner such, for example, as by soldering. The inlet and outlet connections in this construction are quite different fromV those of F ig. 1 and are adapted when assembled to be permanently soldered or otherwise secured in place. The inlet connection comprises a cylindrical sleeve 22 adapted to receive in one end thereot an end of pressure cylinder 21. and in the other end, a packing gland 2li. Formed integrally with the cylindrical portion 22 is an angularly disposed hose connector 23. The pack-V vgland and packing nut and carries on one end the valve disk 28 and on the other end an operating member 27. The spring for urging. the valve disk against the nozzle body is in this torni of the invention disposed between the packing gland 2a and a Washer 81. r'he Washer 31 is held in place by a split locking ring 31 disposed in a circum- .terential groove in the valve stem. At the discharge endet the gun. the cup 10 of Fig. 1 is dispensed with ,'the nozzle body 32 is fitted directly into the end of the pressure cylinder 21 and soldered in place. The valve body in this form ot the invention differs in no important respect from that oFig. 1 and there fore need not be again described. The valve disk, however, is of a somewhat different form inasmuch as instead of a single aperture, it is provided with an enlarged cutaway portion as shoivn in Fig. 7, of suiiicient dimensions to accommodate registration with both outlet ports in the valve body simultaneously. By doing away with an additional connecting member between the valve body and the pressure chamber and placing the valve spring Within the inlet coupling 2:2, a much shorter and more compact spray gun structure is provided.

Figs. 10 and 11 simply illustrate the interchangeability of the two types of valve diskV disclosed in the figures above described. In these ligures, a valve disk 28, corresponding in structure to the valve disk 8 of Fig. 1, is employed in connection withV the spray gun assembly shown in Fig. 5@ In other words, it is entirely possible to employ either form of valve disk in connection with any of the several terms of spray gun herein shown, the selection of a particular valve disk being in all cases determined by the action desired and the particular Work to beperformed.

Figs. 12, 13, and 1x1 illustrate a modified form ot nozzle body Which may be used in conjunction with any of the spray gun assemblies herein shoivn. The essential difference between the nozzle body in these figures and that of the other figures is that in these figures the body is straight rather than curved or elbow-like formation. The nozzle 4-2 is provided With one discharge port da passing straight through the body and in parallel relation to the axis of the valve stem, and a second outlet port L13 having a portion con centric With the axis of thevalve stem and a connecting portion terminating eccentric to the axis of the stem. The valve seating tace of the nozzle body is thu-s provided With two eccentrically disposed outlet ports as seen in Fig. 14, While the discharge end of the body is provided With one concentric and one eccentric port as seen in Fig. 13. It Will be understood that this form of valve body may be employed with either of the two types of f valve disks and with either of the assemblies shown in the preceding figures.

The curved elbow-like form of nozzle body is extremely advantageous forcertain classes of work where there is not sufficient room for freedom of manipulation of the entire gun. The straight `valve body is, of course, a simpler and cheaper construction and is fully as'efiicient as the elbow vbody under ordinary conditions.

It will be appreciated that by the above constructions there is provided a very simple and efficient high pressure spray gun. In all foi-ins of the invention, access may readily be had to the discharge ports in the nozzle body for the purpose of inspection and cleaning by simply removing the threaded cap l5'.r`

In the construction of Fig. l, it is important to note that the entire valve body may be readily removed at any time for any purpose whatever, such, for example, as cleaning the ports, replacing the compression spring, or

dislodging any foreign matter from the valve opening or from between the surfaces. It is also important to note that in all forms of the invention, the seating of the valve disk is in the direction of and is accordingly assisted relieved, thereby precluding the possibility of foreign matter entering between the valve surfaces under any circumstances. p

A most convenient and efficient iegulation ofthe fluid is afforded by the arrangement of the valve and operating means in my invention. By merely rotating the handle 7 the operator is able yto accurately control the amount of fluid to be discharged by the gun as well as the character of the discharged stream. If a straight, forceful stream is desired, it is only necessary for the operator to rotate the valve handle to a position wherein the concentric discharge port of the valve body will be in registration with the opening in the valve disks, and if a swirling spray is desired, registration between the valve opening and the eccentric port in the valve body may be readily effected. Between these two extremes, a discharge of any desired characteristics may be obtained by suitably adjusting the valve disk to any one of a number of positions wherein both discharge ports are in communication with the valve port.

Having now fully described my invention and the manner in which it may be constructed and used, what I claim is:

1. In a device of the character described.A

.the combination with a pressure chamber, of

,n with said ports.

ports, all of which are eccentric to theV ,axis` thereof at the intake surfacethereof, and one of which isrconcentric to the axis thereof at the outlet surface'thereof, and a disc valve disposed within the chamber and coacting 'end of said cylinder, the said discharge connection comprising a curved nozzle body secured to the discharge end of the cylinder, a plurality of ports passing through said nozzle body, and a valve disk within the cylinder and cooperating with the said poi'ts in the nozzle body said valve disc having a single opening therethrough for selectively controlling the passage of fluidtherethrough.

3. Ina device of the character described, the combination with a pressure cylinder, of an inlet connection at one end of said cylinder, a valve stem projecting through the said inlet connection into the cylinder, of an outlet connection secured to the opposite end of the said cylinder, said outlet connection comprising a curved nozzle body, a ported valve disk operatively connected with said valve stem and coacting with one surface of said body, a plurality of discharge ports extending from said surface through said body, a pressure cap secured to the outer end of said body and having a discharge orifice, and means for rotating said valve stem for selectively directing fluid through one or more of the said ports.

4. In a device of the character described, the combination with a nozzle body, of a disk valve cooperating with the surface of said body at itsinlet end, and a pressure cup having' a discharge orifice secured tothe said body at its discharge end, and a plurality of ports passing through said'body, one of the said ports being formed by a substantially larly related bores, starting and terminating eccentric to the axis of the body, said disc valve having an eccentrically disposed opening therethrough for selective cooperation 5. In a spray gun, the combination with a tubular pressure chamber, of an inlet coupling secured to one end of the chamber and an outlet coupling secured to -the opposite end of the said chamber, a valve stem projecting through the inlet coupling and into the chamber, a valve disk secured to the said valve stem, means for urging the valve disk in the direction of the outlet end of said chamber, and a nozzle body secured to the outlet end of the chamber and coacting with the said valve disk, said nozzle body having a plurality of angularly related discharge porte passing therethrough, a pressure cap secured to one end of the said body and provided with a single discharge orifice iii open communication with said ports, aud means for rotating said Valve stem whereby to selectively direct fluid through any one of the said discharge ports or through a plurality of them simultaneously in various proportions or to close all of said ports.

In testimony whereof I a'liX my signature.

ARTHUR HULL.V 

